CN1862376A - Mask blank transparent substrate manufacturing method, mask blank manufacturing method, and exposure mask manufacturing method - Google Patents
Mask blank transparent substrate manufacturing method, mask blank manufacturing method, and exposure mask manufacturing method Download PDFInfo
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- CN1862376A CN1862376A CNA2006100514335A CN200610051433A CN1862376A CN 1862376 A CN1862376 A CN 1862376A CN A2006100514335 A CNA2006100514335 A CN A2006100514335A CN 200610051433 A CN200610051433 A CN 200610051433A CN 1862376 A CN1862376 A CN 1862376A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/60—Substrates
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/26—Phase shift masks [PSM]; PSM blanks; Preparation thereof
- G03F1/32—Attenuating PSM [att-PSM], e.g. halftone PSM or PSM having semi-transparent phase shift portion; Preparation thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/62—Pellicles, e.g. pellicle assemblies, e.g. having membrane on support frame; Preparation thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70491—Information management, e.g. software; Active and passive control, e.g. details of controlling exposure processes or exposure tool monitoring processes
- G03F7/705—Modelling or simulating from physical phenomena up to complete wafer processes or whole workflow in wafer productions
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70691—Handling of masks or workpieces
- G03F7/70783—Handling stress or warp of chucks, masks or workpieces, e.g. to compensate for imaging errors or considerations related to warpage of masks or workpieces due to their own weight
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- General Physics & Mathematics (AREA)
- Preparing Plates And Mask In Photomechanical Process (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
A method includes a preparation step of preparing a transparent substrate having a precision-polished main surface, a surface shape information obtaining step of obtaining, as surface shape information, height information at a plurality of measurement points on the main surface of the transparent substrate that contacts a mask stage of an exposure apparatus, a simulation step of obtaining, based on the surface shape information and shape information of the mask stage, height information at the plurality of measurement points by simulating the state where the transparent substrate is set in the exposure apparatus, a flatness calculation step of calculating, based on the height information obtained through the simulation, a flatness of the transparent substrate when it is set in the exposure apparatus, a judging step of judging whether or not the calculated flatness satisfies a specification, and a thin film forming step of forming a thin film as serving as a mask pattern, on the main surface of the transparent substrate whose flatness satisfies the specification.
Description
The present invention requires the right of priority of Japanese patent application JP 2005-50936 formerly, by reference the disclosed content of this patented claim is combined in here.
Technical field
The present invention relates to be suitable for the manufacture method of the transparent substrate short wavelength zone, that be used for mask blank, exposure wavelength in described short wavelength zone is 200nm or shorter, and then, the present invention relates to the manufacture method of mask blank and the manufacture method of exposed mask.
Background technology
In recent years, miniaturization along with semiconductor devices, the exposure light source that uses in photoetching technique has changed to the ArF excimer laser, and (exposure wavelength: 193nm) (exposure wavelength: 157nm), thereby the shortening of exposure wavelength makes progress with the F2 excimer laser.
When the exposure wavelength wavelength becomes 200nm or more in short-term, the depth of focus of exposure device becomes very little.Thereby, when being encased in exposed mask in the exposure device by vacuum draw etc., its flatness is reduced, and in the time of then on the mask graph of exposed mask is transferred to as the semiconductor chip of transfer printing object, focal position can be shifted.Like this, transfer printing precision usually reduces.
In order to address this problem, JP-A-2004-46259 (below will be referred to as patent documentation 1) has disclosed a kind of technology, in this technology, for making the mask blank that exposed mask is used, calculate by simulation, flatness when appraisal is encased in it in exposure device is made exposed mask by the mask blank of evaluating the flatness excellence that.
Specifically, by on transparent substrate, forming optical screen film (opaque coating), make mask blank, one of the surface configuration of the first type surface by measuring mask blank (four types, that is, convex, spill, the shape of a saddle, and half-cylindrical) and the flatness (first type surface of mask blank is with respect to the difference between the highs and lows of certain reference plane) of mask blank.Then, from the structure of the mask platform of the flatness of the mask blank that draws like this and exposure device, by utilizing finite element method etc., derive the flatness of the mask blank when being installed to mask blank on the mask platform of exposure device by simulation.When the flatness of the mask blank of deriving out by simulation satisfies technical standard, make exposed mask by this mask blank.
But, in the technology of patent documentation 1, employed those data when the simulation of the flatness of mask blank when being encased in it in exposure device is derived in implementation, be (one of four types of flatness (first type surface of mask blank is with respect to the difference between the highs and lows of certain reference plane) and surface configurations, that is, convex, spill, the shape of a saddle, and half-cylindrical).
When the first type surface of transparent substrate when being precise polished, its surface configuration complexity, promptly, for example, have the combination of corrugated or convex and spill, thereby such a case occurs, in this case, Biao Mian shape and do not correspond to any in foregoing four types.Thereby, although forcibly the complex surfaces state of first type surface is applied to the flatness and the simple surface configuration (convex of mask blank, spill, or the like), so that the flatness of the mask blank when deriving in mask blank is placed in exposure device by simulation, but when in fact placing exposed mask in the exposure device, the flatness of being derived might be with not consistent by the flatness of the produced exposed mask of described mask blank.
And then, in the technology of patent documentation 1, employed data (surface configuration and flatness) when simulating so that deriving the flatness of the described mask blank when being encased in mask blank in the exposure device are the data with the mask blank that is formed on the optical screen film on the transparent substrate.
When by forming on transparent substrate after optical screen film makes mask blank, if measure the flatness and the surface configuration of this mask blank, considerable particulate sticks to and causes defective on the optical screen film.When exposure wavelength reaches 200nm or shorter short wavelength zone, in the technical standard of decision size of defective and number and optical characteristics (for example, on first type surface, transmissivity departs from and the variation of plane internal transmission factor etc. with respect to design load) technical standard in, safety coefficient can reduce.Thereby mask blank might not satisfy these technical standards.
And then, under the big situation of the membrane stress of the optical screen film of mask blank, when when optical screen film being formed pattern make exposed mask, in the flatness of the mask blank of deriving out and with exposed mask between the flatness of actual this exposed mask when being encased on the exposure device by simulation, difference might appear, the shape of the pattern of these differences and optical screen film, the occupation rates of the figure of optical screen film on the first type surface of transparent substrate etc. are relevant, particularly, when optical screen film was reduced, the difference between this flatness can appear.Thereby, exist the possibility that can not accurately evaluate flatness.
Summary of the invention
Therefore, purpose of the present invention provides a kind of manufacture method of mask blank transparent substrate, and the flatness when this method can accurately be calculated (appraisal) transparent substrate and is encased in the exposure device by simulation is with manufacturing mask blank transparent substrate.
Another object of the present invention provides a kind of manufacture method of mask blank, flatness when this method can accurately be calculated (appraisal) transparent substrate and is encased in the exposure device by simulation, with the manufacturing mask blank, and this method can suppress generation of defects.
A further object of the present invention provides a kind of manufacture method of exposed mask, and this method is made exposed mask by utilizing mask blank recited above.
In order to solve above-mentioned problem, the present invention includes following aspect.
(first aspect)
According to a first aspect of the invention, provide a kind of manufacture method of mask blank transparent substrate, comprising:
Preparation process in this step, prepares to have the transparent substrate of precise polished first type surface;
The surface shape information obtaining step, in this step, surface shape information as described first type surface, obtain elevation information at a plurality of measurement points apart from reference plane, wherein, described a plurality of measurement point is arranged in the predetermined zone on the first type surface of the transparent substrate that contacts with the mask platform of exposure device;
Simulation steps, in this step, according to surface shape information that in the surface shape information obtaining step, obtains and the shape information that comprises the mask platform in the zone that mask platform contacts with the first type surface of transparent substrate, be encased in state in the exposure device by the simulation transparent substrate, obtain the elevation information of the described reference plane of distance at a plurality of measurement points;
The flatness calculation procedure, in this step, elevation information according to the described reference plane of distance that in simulation steps, obtains, derive poor between maximal value in the presumptive area of the transfer area that comprises exposed mask and the minimum value, thereby obtain the flatness of the transparent substrate when being encased in transparent substrate in the exposure device; And
Determining step in this step, judges whether the flatness of calculating satisfies technical standard in the flatness calculation procedure.
(second aspect)
According to a second aspect of the invention, in aspect first, presumptive area on the first type surface of transparent substrate is set at the zone that the mask platform that makes this zone comprise exposure device contacts with described first type surface, wherein, the presumptive area on the described first type surface is the zone that obtains surface shape information in the surface shape information obtaining step.
(the 3rd aspect)
According to a third aspect of the present invention, in aspect second, set the presumptive area on the first type surface of transparent substrate for a such zone, the chamfer surface that this zone does not comprise the distance transparent substrate greater than 0mm, be not more than the peripheral edge margin of 3mm, wherein, the presumptive area on the described first type surface is the zone that obtains surface shape information in the surface shape information obtaining step.
(the 4th aspect)
According to a fourth aspect of the present invention, provide a kind of method of making mask blank, comprising:
Preparation process in this step, prepares to have the transparent substrate of precise polished first type surface;
The surface shape information obtaining step, in this step, surface shape information as described first type surface, obtain elevation information at a plurality of measurement points apart from reference plane, wherein, described a plurality of measurement point is arranged in the predetermined zone on the first type surface of the transparent substrate that contacts with the mask platform of exposure device;
Simulation steps, in this step, according to surface shape information that in the surface shape information obtaining step, obtains and the shape information that comprises the mask platform in the zone that mask platform contacts with the first type surface of transparent substrate, be encased in state in the exposure device by the simulation transparent substrate, obtain the elevation information of the described reference plane of distance at a plurality of measurement points;
The flatness calculation procedure, in this step, elevation information according to the described reference plane of distance that in simulation steps, obtains, derive poor between maximal value in the presumptive area of the transfer area that comprises exposed mask and the minimum value, thereby obtain the flatness of the first type surface of the transparent substrate when being encased in transparent substrate in the exposure device;
Determining step in this step, judges whether the flatness of calculating satisfies technical standard in the flatness calculation procedure; And
Film forms step, in this step, is judged as in determining step on the first type surface of the transparent substrate that satisfies technical standard in the flatness of its first type surface, forms the film as mask graph.
(the 5th aspect)
According to a fifth aspect of the present invention, in aspect the 4th, presumptive area on the first type surface of transparent substrate set for the zone that the mask platform that makes this zone comprise exposure device contacts with described first type surface, wherein, presumptive area on the described first type surface is the zone that obtains surface shape information in the surface shape information obtaining step.
(the 6th aspect)
According to a sixth aspect of the invention, in aspect the 5th, set the presumptive area on the first type surface of transparent substrate for a such zone, the surface of chamfering that this zone does not comprise the distance transparent substrate greater than 0mm, be not more than the peripheral edge margin of 3mm, wherein, presumptive area on the described first type surface is the zone that obtains surface shape information in the surface shape information obtaining step.
(the 7th aspect)
According to a seventh aspect of the present invention, described the 4th aspect further comprises the membrane stress controlled step, in this step, when carrying out film and form step and/or afterwards, reduces the membrane stress of this film.
(the 8th aspect)
According to an eighth aspect of the present invention, aspect the 7th in, by this film is heated to 150 ℃ or more than, carry out described membrane stress controlled step.
(the 9th aspect)
According to a ninth aspect of the present invention, aspect the 4th in, be a kind of like this shape in the surface configuration of the first type surface of the transparent substrate that forms film side, that is, the height of first type surface reduces to peripheral edge margin gradually from the central area.
(the tenth aspect)
According to a tenth aspect of the present invention, provide a kind of method of making exposed mask, comprising: in by the mask blank that obtains according to the mask blank manufacture method aspect the 4th, film is formed figure, so that on transparent substrate, form film pattern.
(the 11 aspect)
According to an eleventh aspect of the present invention, a kind of method of making semiconductor devices is provided, comprise: the exposed mask that obtains by the exposed mask manufacture method according to the tenth aspect is set, and the film pattern of exposed mask is transferred to etchant resist on the semiconductor chip.
According to first, second, the present invention of the 4th or the 5th aspect, can realize following effect., simulate under the state that transparent substrate is encased in the exposure device apart from elevation information of reference plane etc. according to a plurality of measurement point on the first type surface of transparent substrate.In described simulation, a plurality of measurement point on the first type surface of transparent substrate, the elevation information when obtaining to be encased in transparent substrate in the exposure device apart from reference plane.According to the elevation information that in simulation, obtains, calculate the flatness of the transparent substrate when being encased in it in exposure device, thereby, can be with high precision appraisal flatness.Thereby by by making exposed mask according to the produced mask blank of this flatness that accurately calculates transparent substrate, described exposed mask satisfies the technical standard for flatness, graph position degree of accuracy etc.Thereby, when utilizing this exposed mask to carry out graph transfer printing, can improve transfer printing precision.
And then, go up film forming film at transparent substrate (mask blank transparent substrate) and form step, after surface shape information obtaining step, simulation steps and flatness calculation procedure, carry out.Therefore, in these steps, particulate can not stick on the described film.Thereby, can be suppressed on the mask blank that will make and produce defective.
Invention according to the 3rd or the 6th aspect can realize following effect.Be used for obtaining the predetermined zone of the first type surface of surface shape information at the surface shape information obtaining step, be do not comprise the chamfer surface that leaves transparent substrate greater than 0mm, be not more than the zone of the peripheral edge margin of 3mm.Therefore, can be determined at the surface shape information in this presumptive area with very high precision.
Invention according to the 7th or the 8th aspect can realize following effect.Be used to reduce the membrane stress controlled step of the membrane stress of film, when carrying out film and form step and/or carry out afterwards.Thereby, even, also can reduce this membrane stress being formed at thin-film memory on the transparent substrate when making the membrane stress of transparent substrate (mask blank transparent substrate) distortion.Consequently, consistent between the flatness that can make transparent substrate and the flatness of exposed mask, then, make exposed mask by this mask blank, and, be encased on the exposure device this exposed mask is actual then, wherein, the flatness of described transparent substrate is by in a plurality of measurement point, by simulation the transparent substrate elevation information that the state of exposure device obtains of packing into is calculated, and the flatness of described exposed mask is to obtain when making mask blank by the film of formation on transparent substrate (mask blank transparent substrate).
Invention according to the 9th aspect can realize following effect.Surface configuration at the first type surface of the transparent substrate that forms film side is a kind of like this shape, that is, the height of first type surface reduces to peripheral edge margin gradually from its central area.Thereby when utilization has exposed mask that the transparent substrate (mask blank transparent substrate) of this shape makes when being loaded into exposure device, it is very excellent that the flatness of exposed mask becomes.Thereby, can satisfy technical standard for exposed mask.
Invention according to the tenth aspect can realize following effect.By being formed figure, the film in the mask blank makes exposed mask, so that go up the formation film pattern at transparent substrate (mask blank transparent substrate).Thereby when packing it into exposure device, this exposed mask can satisfy the technical standard for flatness, graph position precision etc.Thereby,, can improve transfer printing precision when utilizing this exposed mask to carry out graph transfer printing.
According to an eleventh aspect of the present invention, can obtain following effect.By adopting the exposed mask of flatness and graph position accuracy excellence when being set to it in exposure device, can carry out graph transfer printing on the on-chip etchant resist being formed at.Thereby, can make and have correctly according to the accurate figure of design and do not form the semiconductor equipment of graphic defects.
Description of drawings
Fig. 1 is a process flow diagram, and the manufacture method according to the shadow tone phase shifting mask blank of an embodiment of mask blank manufacture method of the present invention is used in expression;
Fig. 2 A is the skeleton view of transparent substrate, is used to illustrate when obtaining surface shape information and the measurement point during by the analog computation elevation information;
Fig. 2 B is the view of the amplification of the part among the presentation graphs 2A;
Fig. 3 A is a planimetric map, and expression is arranged on state on the mask platform of exposure device with transparent substrate;
Fig. 3 B is the cut-open view along the III-III line intercepting of Fig. 3 A;
Fig. 4 is the skeleton view of transparent substrate, is used to illustrate the measurement point when calculating flatness; And
Fig. 5 A and 5B are the cut-open views of the structure of expression mask blank.
Embodiment
A preferred embodiment of the present invention is now described with reference to the accompanying drawings.
Fig. 1 is a process flow diagram, and the manufacture method according to the shadow tone phase shifting mask blank of an embodiment of mask blank manufacture method of the present invention is used in expression.
The manufacture method of mask blank shown in Figure 1 comprises that transparent substrate (artificial quartz glass's substrate) preparation process (S1), surface shape information obtaining step (S2), simulation steps (S3), flatness calculation procedure (S4), determining step (S5), film form step (S6), etchant resist forms step (S8) and exposed mask manufacturing step (S9).Thin-film memory on being formed on transparent substrate in order to reduce this membrane stress, can be provided with membrane stress controlled step (S7) when causing the membrane stress of transparent substrate distortion.
On the other hand; according to the manufacture method of mask blank transparent substrate of the present invention, comprise transparent substrate shown in Figure 1 (synthetic quartz glass basis sheet) preparation process (S1), surface shape information obtaining step (S2), simulation steps (S3), flatness calculation procedure (S4) and determining step (S5).Below, foregoing each step will be described successively.
(A) transparent substrate preparation process (S1)
Artificial quartz glass's plate is carried out chamfering, described artificial quartz glass's plate obtains by following manner: the size that will utilize artificial quartz glass's ingot of the described method manufacturing of JP-A-H08-31723 or JP-A-2003-81654 to cut into to be about 152mm * about 152mm * about 6.5mm obtains, then, with first type surface 1 and 2, end face 3 and chamfer surface 4 (see figure 2)s surface as artificial quartz glass's plate, carry out mirror polish, and then, carry out first type surface 1 and 2 precise polished.In this manner, prepare transparent substrate 5 (artificial quartz glass's substrate).Form among the step S6 at film, on main film 1, form film (semi-transmissive film).In transparent substrate preparation process S1, with root mean square (RMS) roughmeter, the first type surface 1 of transparent substrate 5 and 2 surfaceness are set in about 0.2nm or following, meanwhile, in arithmetic mean value roughness (Ra), the surfaceness of end face 3 and chamfer surface 4 is set in about 0.03 μ m or littler.
(B) surface shape information obtaining step (S2)
As the method for the surface shape information of the first type surface 1 that obtains transparent substrate 5, for example, can utilize the flatness measurement mechanism (not shown) that adopts known optical interference meter, described flatness measurement mechanism adopts known optical interference meter.In order to suppress as much as possible because the skew of the transparent substrate 5 that himself weight causes, the device of the type that described measurement mechanism preferably can measurement flatness when transparent substrate 5 vertically or is basically vertically stood.Here, as shown in Figure 2, surface shape information is represented: the predetermined zone on the first type surface 1 of being located at transparent substrate 5 is (in a * a), (Xm, Yn) (m and n are integer) located, apart from the elevation information Zk of reference plane 7 (focussing plane that utilizes least square method to calculate) at a plurality of measurement point P.Preferably, as far as possible accurately measuring height information Zk particularly, measures millimicron (nm) order of magnitude.
(a * a) suitably select according to following factor, described factor comprises: zone that mask platform 8 (see figure 3)s of the measuring accuracy of the size of transparent substrate 5, flatness measurement mechanism and exposure device (not shown) contact with the first type surface 1 of transparent substrate 5 or the like to be used for the predetermined zone of surface measurements shape information.Preferably, on the whole zone of the first type surface 1 of transparent substrate 5, obtain surface shape information, so that carry out simulation described later with high precision.But, be set the zone that contacts with the first type surface 1 of transparent substrate 5 for the mask platform 8 that comprises exposure device at least.
Adopt at the flatness measurement mechanism under the situation of existing optical interference meter, at the circumference of transparent substrate 5, that is, and shown in Fig. 2 B, near the boundary between first type surface 1 and each end face 3 (perhaps each chamfer surface 4), be difficult to accurately measuring height information Zk.Consider these problems, preferably, (a * a) is set at such zone, and described zone is the zone of removing acquisition by the peripheral edge margin b that from the whole zone of first type surface 1 each chamfer surface 4 of distance transparent substrate 5 is not more than 3mm greater than 0mm will to be used to obtain the presumptive area of the first type surface 1 of surface shape information.Particularly, (a * a) is preferably set to such zone will to be used to obtain the presumptive area of surface shape information, described zone is to remove the zone that is obtained by the peripheral edge margin b that from the whole zone of first type surface 1 each chamfer surface 4 of distance transparent substrate 5 is not less than 0.5mm and is not more than 2.5mm, more preferably be set at such zone, described zone is to remove the zone that is obtained by the peripheral edge margin b that from the whole zone of first type surface 1 each chamfer surface 4 of distance transparent substrate 5 is not less than 1mm and is not more than 2mm.For example, have at transparent substrate 5 under the situation of size of 152mm * 152mm, (a * a) is preferably set to the size of 146mm * 146mm, more preferably is set at the size of 148mm * 148mm will to be used to obtain the presumptive area of surface shape information.
And then in order to carry out the simulation of describing later with high precision, preferably, (Xm Yn) sets manyly as much as possible with measurement point P.Yet, although by increase measurement point P (Xm, number Yn) can reach more accurate simulation results,, simulation needs a large amount of time.Thereby, preferably, consider these factors determine measurement point P (Xm, Yn).For example, can (Xm Yn) be set at 256 * 256 points with measurement point P.
(C) simulation steps (S3)
In this simulation steps, as shown in Figure 3, transparent substrate 5 is placed on state on the mask platform 8 of exposure device by simulation, on the first type surface 1 of transparent substrate 5, (Xm Yn) locates, and derives the elevation information ZSk (k is an integer) apart from reference plane 7 at a plurality of measurement point P.
Obtain when transparent substrate 1 is placed exposure device by simulation, a plurality of measurement point P (Xm on transparent substrate 5, Yn) the necessary condition of the elevation information ZSk that locates (seeing Fig. 2 A) is, the a plurality of measurement point P (Xm on the first type surface 1 of transparent substrate 5 that in surface shape information obtaining step S2, obtain, Yn) the elevation information Zk that locates apart from reference plane 7, and comprise the shape information of the zone that mask platform 8 contacts with the first type surface 1 of transparent substrate 5 (that is, each in mask platform 8 has the zone of the width L3 of the width L2 of directions X and Y direction) in the mask platform 8 of interior exposure device.The shape information of mask platform 8 comprises: width L2, width L3 and have distance L 1 between those zones of directions X width L2 and Y direction width L3 at each.The differential equation according to the deflection in the mechanics of materials, by these information, by simulation, can obtain when on the mask platform 8 that transparent substrate 5 is arranged on exposure device, a plurality of measurement point P on the first type surface 1 at transparent substrate 5 (Xm, Yn) locate apart from reference plane 7 elevation informations.
The aforementioned deflection differential equation is derived by following mode, and wherein, the positive dirction of Z axle is defined as gravity direction.
(on being placed on mask platform time, the elevation information ZSk on the first type surface of transparent substrate)
=(the elevation information Zk on the first type surface that in surface shape information obtaining step S2, obtains) at transparent substrate
+ (transparent substrate along directions X with respect to warpage) as the mask platform of fulcrum (leverage)
+ (transparent substrate since gravity and along the deflection of directions X (
Maximal value at the transparent substrate center)))
-(transparent substrate contact with mask platform in the zone of Y direction, the mean value of the elevation information Zk of transparent substrate)
Here, directions X and Y direction provide in Fig. 3 A.Directions X is perpendicular to the direction of the longitudinal direction of mask platform 8, and the Y direction is the direction along the longitudinal direction of mask platform 8.And then " zone along the Y direction that transparent substrate contacts with mask platform " is to derive from zone shape information, that mask platform 8 contacts with the first type surface 1 of transparent substrate 5 as mask platform 8.In Fig. 3 B, 5 expressions of transparent substrate shown in the solid line are with the state of its setting (keeping by suction) before on the mask platform 8, and transparent substrate 5 expressions shown in the dotted line are with the state after its setting (keeping by suction) is on mask platform 8.
Thereby, (that is,, simulate at a plurality of measurement point P (Xm, the elevation information Zk that Yn) locates) etc. apart from reference plane 7 according to the surface shape information of the complex surfaces state of foregoing, as to consider transparent substrate 5 first type surface 1.Thereby, and in the simple condition of utilization described in the patent documentation 1, promptly utilize the surface configuration of the first type surface of transparent substrate to compare, can obtain high-precision analog result with the situation that single flatness is simulated.
If replace adopting aforesaid single value (0.1 μ m), utilization is at the center line of transparent substrate 5 (center by transparent substrate 5 also is parallel to the straight line of the Y direction of mask platform 8) locate the to have maximal value quartic surface of (0.1 μ m), so that consider transparent substrate 5 each position at directions X, evaluate the gravity deformation of transparent substrate 5 by this, can obtain more accurate simulation results.And then, the shape information of foregoing mask platform 8, the zone that contacts with the first type surface 1 of transparent substrate 5 except mask platform 8 (promptly, each has the zone of the width L3 of the width L2 of directions X and Y direction) outside, can also be included in the information relevant in the aforementioned areas (surface) of aforementioned mask platform 8 and first type surface 1 contact of transparent substrate 5 with the flatness of mask platform 8.And then analogy method is not limited to above-described method, also can adopt common finite element method to simulate.
(D) flatness calculation procedure (S4)
In this flatness calculation procedure, as shown in Figure 4, utilize obtain among the simulation steps S3 in front apart from reference plane 7 elevation information ZSk, derive presumptive area in the transfer area that comprises the exposed mask (not shown) (maximal value and minimum value in the c * d).In this manner, when calculating in being placed on exposure device, the flatness on the first type surface 1 of transparent substrate 5.This flatness helps the formation of excellent transfer graphic when utilizing exposure device to carry out graph transfer printing.Comprise that (c * d) decides according to kind of exposure wavelength, the Micropicture (circuitous pattern) that will form etc. for the presumptive area of the transfer area of exposed mask on semiconductor wafer.For example, have at mask blank under the situation of size of 152mm * 152mm, can (c * d) sets the rectangular shape of 104mm * 132mm, the perhaps square shape of 132mm * 132mm for the presumptive area that comprises the transfer area of mask.
(E) determining step (S5)
The flatness that to calculate in aforementioned flatness calculation procedure S4 and predetermined technical standard compare, thereby judge whether it satisfies technical standard.To be judged as the transparent substrate 5 that satisfies technical standard, be appointed as mask blank transparent substrate 5A.Have only this mask blank transparent substrate 5A to stand film forming film formation step S6 on transparent substrate 5A.Production mask blank in this manner.For being judged as the transparent substrate 5 that does not satisfy technical standard, its first type surface 1 is handled once more, prepare transparent substrate, so that make it to satisfy technical standard by simulation.
Foregoing technical standard according to the substrate chuck structure of the mask platform of exposure wavelength, exposure device etc., calculates and determines the flatness that mask blank (or exposed mask) allows.For example, when exposure light source is an ArF excimer laser (exposure wavelength: 193nm), and substrate chuck structure (the support structure that is used for transparent substrate 5) is such one type, promptly, shown in Fig. 3 B, two air entries 10 are formed between three supports 9, the first type surface 1 that each of described support is parallel to transparent substrate 5 linearly extends, transparent substrate 5 be held (being sucked maintenance) thus when being bearing on the support 9, (in the 104mm * 132mm), foregoing technical standard limits 0.24 μ m or littler flatness in the predetermined zone of the transfer area that comprises exposed mask.
Consider when utilizing vacuum cup to be arranged on transparent substrate 5 on the mask platform 8, transparent substrate 5 is to the distortion of the top of the mask platform 8 of exposure device, forming film side, just with mask platform 8 contact sides, the surface configuration of first type surface 1, select according to the elevation information Zk that obtains among the described surface shape information obtaining step S2 in front, make the height of first type surface 1 reduce gradually to its peripheral part, shown in the solid line among Fig. 3 B from its central area.Simulate the distortion that causes by leverage and cancel out each other by the skew distortion that gravity causes by transparent substrate 5 with respect to such selection.Thereby, preferably, the transparent substrate 5 that has better flatness after can obtaining on the mask platform 8 that transparent substrate 5 is placed exposure device, thus satisfy for the desired technical standard of exposed mask.
(F) film forms step (S6)
Then, in aforementioned determining step S5, under the state on the mask platform 8 that transparent substrate 5 is placed on exposure device, be judged as the flatness of the transparent substrate 5 that satisfies technical standard, utilize sputtering method, (that is, mask blank transparent substrate 5A form film (half transmitting film) 11 on) the first type surface 1, described film will form mask graph at described transparent substrate 5.In this manner, make the transparent substrate that has film shown in Fig. 5 A.For example, utilize the DC magnetic control sputtering device to finish the formation of film (half transmitting film) 11.
(G) membrane stress controlled step (S7)
For example, when forming film and/or after the formation film, under the situation of under 150 ℃ or high temperature, the transparent substrate that has film being heat-treated, perhaps, shown in Fig. 5 B, form under the situation of multilayer at the film that will be formed on the mask blank transparent substrate 5A, just (for example have compression stress and described layer at described layer (for example the half transmitting film 11), optical screen film 12) has under the situation that the membrane stress of drawing stress and film 11 and 12 cancels out each other, carry out the membrane stress controlled step.In the example that present embodiment and back will be described, will be described the previous case (thermal treatment).
(H) etchant resist forms step (S8)
Then, in the transparent substrate that has film (half transmitting film 11), on the surface of half transmitting film 11, apply resist, heat-treat then, so that form etchant resist 13.Like this, make mask blank 14 (shadow tone phase shifting mask blank).Utilize flaw detection apparatus to be used to detect the measurement of the defective (pin hole and particulate) of mask blank 14.
(I) exposed mask manufacturing step (S9)
The graphic plotting soldier that the etchant resist 13 of mask blank 14 stands to be scheduled to develops subsequently, thereby forms resist figure (not shown).Subsequently, utilize this resist figure, half transmitting film 11 is carried out dry ecthing as mask, thereby, as mask graph, form half transmitting film pattern (not shown).At last, remove resist figure (etchant resist 13), thereby, obtain the exposed mask (not shown), in this exposed mask, on mask blank transparent substrate 5A, form the half transmitting film pattern.
(J) semiconductor devices manufacturing step
The exposed mask that obtains is placed on the mask platform of exposure device.Utilize this exposed mask and according to photoetching technique, utilize the ArF excimer laser as exposure light source, the mask graph (half transmitting film pattern) of exposed mask is transferred on the etchant resist that is formed on the transparent substrate, makes on semiconductor chip, to form desired circuitous pattern.By this way, make semiconductor devices.
(K) effect of embodiment
Utilize above-described structure,, reach following effect (1) to (5) according to previous embodiment.
(1) (Xm Yn) locates apart from the elevation information Zk of reference plane etc., carries out placing simulation under the state on the mask platform 8 of exposure device at transparent substrate 5 according to a plurality of measurement point P on the first type surface 1 of transparent substrate 5.In simulation process, (Xm Yn) locates a plurality of measurement point P on the first type surface 1 of transparent substrate 5A, obtains the elevation information ZSk apart from reference plane 7.According to the elevation information ZSk that in simulation process, obtains, calculate the flatness of the transparent substrate when on the mask platform 8 that is placed on exposure device.Thereby, can evaluate this flatness with high precision.And, judge and also select mask blank transparent substrate 5A, and utilize by the produced mask blank 14 of this mask blank transparent substrate 5A and make exposed masks according to the flatness of this transparent substrate 5 that comes out with high precision computation.Thereby this exposed mask satisfies and relevant technical standards such as flatness, graph position precision.Thereby, by utilizing this exposed mask on as the semiconductor chip of transfer printing object, during transfer graphic, can improve transfer printing precision.
(2) film of formation film 11 forms step (S6 among Fig. 1) on mask blank transparent substrate 5A, carries out afterwards in surface shape information obtaining step (S2 of Fig. 1), simulation steps (S3 among Fig. 1) and flatness calculation procedure (S4 among Fig. 1).Therefore, in these steps, particulate can not adhere on the film 11, thereby, can be suppressed on the mask blank to be made and produce defective.
(3) in surface shape information obtaining step (S2 of Fig. 1), (a * a) is such zone, and this zone is that each chamfer surface 4 by removing distance transparent substrate 5 from the whole zone of first type surface 1 draws greater than 0mm, the peripheral edge margin b that is not more than 3mm to be used to obtain the presumptive area of the main film 1 of surface shape information.Thereby, can be with the high-acruracy survey presumptive area (surface shape information (apart from the elevation information Zk of reference plane 7) in a * a).
(4) carry out film when forming step (S6 of Fig. 1) and/or afterwards, carrying out the membrane stress controlled step (S7 of Fig. 1) of the membrane stress that is used for reducing film 11.Therefore, even when having the membrane stress make mask blank transparent substrate 5A distortion in the film 11 on being formed at mask transparent substrate 5A, also can reduce this membrane stress.Consequently, can make the flatness of transparent substrate 5 consistent with the flatness of exposed mask, wherein, the flatness of described transparent substrate 5 be by utilize that simulation places transparent substrate 5 that state on the mask platform 8 of exposure device obtains at a plurality of measurement point P (Xm, Yn) the elevation information ZSk that locates calculates, the flatness of described exposed mask is when obtaining when film 11 is made mask blank 14 by forming on mask blank transparent substrate 5A, then, utilize this mask blank 14 to make exposed masks, then with on the actual mask platform 8 that is arranged on exposure device of this exposed mask.
(5) first type surface 1 of transparent substrate 5 is a kind of like this shape in the surface configuration of a side that forms film 11, and promptly the height of first type surface 1 reduces to its peripheral edge margin gradually from its central area.Thereby when the exposed mask of manufacturing was set on the mask platform 8 of exposure device by mask blank 14, from the mask blank transparent substrate 5A with this shape, exposed mask was to the distortion of the top of mask platform 8, thereby eliminated the skew distortion that is caused by gravity.Thereby it is very excellent that the flatness of exposed mask becomes.Therefore, can satisfy technical standard to the exposed mask requirement.
(example)
Below, will describe the step of making as the shadow tone phase shifting mask blank of mask blank in detail.
(1) transparent substrate preparation process
The first type surface that will have the square slide (artificial quartz glass's sheet) of the size of 152mm * 152mm carries out precise polished and cleaning.Like this, prepare transparent substrate.
(II) surface shape information obtaining step
Utilize the flatness measurement mechanism (by the UltraFlat200M of Corning Tropel manufacturing) that adopts the optical interference meter, presumptive area on the first type surface of transparent substrate (will film forming first type surface) is (in the 148mm * 148mm), on 256 * 256 measurement points, obtain surface shape information (the elevation information that utilizes least square method to calculate), and be stored in the computing machine apart from focussing plane (virtual fully-flattened).According to this surface shape information, the surface configuration of the first type surface of transparent substrate (will film forming first type surface) is such: this shape makes the height of first type surface reduce gradually to its peripheral edge margin from its central area, presumptive area (flatness of 148mm * 148mm) is 0.47 μ m, from but excellent.
(III) simulation steps
(each zone is from the end face of described transparent substrate in the zone that described mask platform contacts with the first type surface of transparent substrate according to the surface shape information that obtains at the surface configuration obtaining step and the mask platform of exposure device, the about shape information among the 10mm * 132mm), by simulation in each measurement point, according to the foregoing deflection differential equation, calculate the elevation information when transparent substrate is arranged in the exposure device apart from reference plane.
(IV) flatness calculation procedure and determining step
By foregoing analog result, derive predetermined zone and (among the 104mm * 132mm), leave poor between the maximal value of reference plane and the minimum value in the transfer area that comprises exposed mask.In this manner, calculate flatness in this presumptive area.Consequently, flatness is that (104mm * 132mm), this flatness is excellent to 0.21 μ m.Thereby the flatness of the first type surface of transparent substrate is judged as and satisfies technical standard when on the mask platform that is placed on exposure device.Therefore, obtain the mask blank transparent substrate.
(V) film forms step
On the first type surface of the mask blank transparent substrate that obtains by the simulation of carrying out according to surface information, form the half transmitting film that molybdenum nitride and silicon are made.Thereby acquisition has the transparent substrate of half transmitting film.
(VI) membrane stress controlled step
To form the transparent substrate that has the half transmitting film that obtains in the step at film and put into annealing device, 300 ℃ of thermal treatments of carrying out 10 minutes, thereby the membrane stress that makes film (half transmitting film) is zero.
(VII) etchant resist forms step
Utilize whirl coating, be controlled as on the zero half transmitting film at membrane stress and form etchant resist, then, handle by prebake, forming thickness is the etchant resist of 400nm.Thereby, obtain to be used for the shadow tone phase shifting mask blank that the ArF excimer laser exposes.Utilize flaw detection apparatus to measure, so that detect the defective (particulate and pore) of shadow tone phase shifting mask blank.Consequently, 0.1 μ m or bigger defective number are below 10 or 10, and this is goodish.
(VIII) shadow tone phase shifting mask manufacturing step
A graph exposure on the etchant resist of shadow tone phase shifting mask blank, then with its development, thereby is formed the resist figure.One after the other, by dry ecthing (SF
6+ He gas) remove the part of the light that exposed to the sun of the film that forms by molybdenum nitride and silicon, thereby obtain figure (half transmitting part) by the film of molybdenum nitride and silicon manufacturing.After etchant resist was peeled off, the mask blank that will have film pattern immersed 99% sulfuric acid (H down at 100 ℃
2SO
4) in 10 minutes so that stand sulfuric acid cleaned, utilize pure water etc. to carry out rinsing then.By this way, obtain to be used for the shadow tone phase shifting mask of ArF excimer laser exposure.
(IX) manufacturing step of semiconductor devices
The shadow tone phase shifting mask that obtains is arranged on the mask platform of exposure device, and the film pattern with the shadow tone phase shifting mask is transferred on the etchant resist of semiconductor wafer then, so that form circuitous pattern.Thereby, make semiconductor devices.Check the semiconductor devices that is obtained.Found that described circuitous pattern does not have defective, is very excellent.
(comparative example)
To be of a size of the precise polished and cleaning of first type surface of the square slide (artificial quartz glass's sheet) of 152mm * 152mm, thus the preparation transparent substrate.On the first type surface of the transparent substrate that obtains by this way, form the half transmitting film of making by molybdenum nitride and silicon, obtain to have the transparent substrate of half transmitting film.
As in the patent documentation 1, utilize the flatness measurement mechanism to measure this flatness and the surface configuration that has the transparent substrate of half transmitting film, and according to the information that is obtained, by utilizing finite element method to simulate, derive the flatness that has the transparent substrate of half transmitting film when time on the mask platform that it is arranged on exposure device.
Because having the flatness of the transparent substrate of half transmitting film is 0.24 μ m or littler, so, it is judged as satisfies technical standard, can form step, shadow tone phase shifting mask manufacturing step and semiconductor devices manufacturing step by etchant resist and make semiconductor devices.The semiconductor devices that is obtained is checked.Consequently, find that the line width of many circuitous patterns changes defective, also found the defective (black defective and white defective) of many circuitous patterns.
The line width of circuitous pattern changes defective, be considered to because the degeneration of the figure focusing accuracy that the following fact causes is caused, the described fact is, the transparent substrate that will have a half transmitting film by simulation is arranged on the described flatness that has the transparent substrate of half transmitting film that state obtained on the mask platform of exposure device, be with the mask platform that it is arranged on exposure device on the time the flatness of exposed mask different.After etchant resist formed, when utilizing flaw detection apparatus to measure the lip-deep defective (particulate and pore) of half transmitting film, the number of 0.1 μ m or bigger defective was 1000 or more.The above-mentioned defective of circuitous pattern is considered to cause that by the particulate of exposed mask and pore these particulates and pore be because these defectives of half transmitting film produce.
Although invention has been described by preferred embodiment,, the present invention is not limited thereto.For example,, in film formation step, on transparent substrate, only formed the half transmitting film although in the example in front,, also can on the half transmitting film, further form light shielding film.
Claims (11)
1. the manufacture method of a mask blank transparent substrate comprises:
Preparation process in this step, prepares to have the transparent substrate of precise polished first type surface;
The surface shape information obtaining step, in this step, surface shape information as described first type surface, obtain elevation information at a plurality of measurement points apart from reference plane, wherein, described a plurality of measurement point is arranged in the presumptive area on the first type surface of the transparent substrate that contacts with the mask platform of exposure device;
Simulation steps, in this step, according to surface shape information that in the surface shape information obtaining step, obtains and the shape information that comprises the mask platform in the zone that mask platform contacts with the first type surface of transparent substrate, by pack into the state of exposure device of simulation transparent substrate, in a plurality of measurement point, obtain the elevation information of the described reference plane of distance;
The flatness calculation procedure, in this step, elevation information according to the described reference plane of distance that in simulation steps, obtains, derive poor between maximal value in the presumptive area of the transfer area that comprises exposed mask and the minimum value, thereby obtain the flatness of the transparent substrate when in the exposure device that transparent substrate is packed into; And
Determining step in this step, judges whether the flatness of calculating satisfies technical standard in the flatness calculation procedure.
2. the manufacture method of mask blank transparent substrate as claimed in claim 1, it is characterized in that, described presumptive area on the first type surface of transparent substrate is set at the zone that the mask platform that comprises exposure device contacts with described first type surface, wherein, presumptive area on the described first type surface is the zone that obtains surface shape information in the surface shape information obtaining step.
3. the manufacture method of mask blank transparent substrate as claimed in claim 2, it is characterized in that, set the described presumptive area on the first type surface of transparent substrate for such zone, promptly, the chamfer surface that this zone does not comprise the distance transparent substrate greater than 0mm, be not more than the peripheral edge margin of 3mm, wherein, the presumptive area on the described first type surface is the zone that obtains surface shape information in the surface shape information obtaining step.
4. the manufacture method of a mask blank comprises:
Preparation process in this step, prepares to have the transparent substrate of precise polished first type surface;
The surface shape information obtaining step, in this step, surface shape information as described first type surface, obtain elevation information at a plurality of measurement points apart from reference plane, wherein, described a plurality of measurement point is arranged in the presumptive area on the first type surface of the transparent substrate that contacts with the mask platform of exposure device;
Simulation steps, in this step, according to surface shape information that in the surface shape information obtaining step, obtains and the shape information that comprises the mask platform in the zone that mask platform contacts with the first type surface of transparent substrate, by pack into the state of exposure device of simulation transparent substrate, in a plurality of measurement point, obtain the elevation information of the described reference plane of distance;
The flatness calculation procedure, in this step, elevation information according to the described reference plane of distance that in simulation steps, obtains, derive poor between maximal value in the presumptive area of the transfer area that comprises exposed mask and the minimum value, thereby obtain the flatness of the first type surface of the transparent substrate when in the exposure device that transparent substrate is packed into;
Determining step in this step, judges whether the flatness of calculating satisfies technical standard in the flatness calculation procedure; And
Film forms step, in this step, is judged as in determining step on the first type surface of the transparent substrate that satisfies technical standard in the flatness of its first type surface, forms the film as mask graph.
5. the manufacture method of mask blank as claimed in claim 4, it is characterized in that, described presumptive area on the first type surface of transparent substrate is set at the zone that the mask platform that comprises exposure device contacts with described first type surface, wherein, presumptive area on the described first type surface is the zone that obtains surface shape information in the surface shape information obtaining step.
6. the manufacture method of mask blank as claimed in claim 5, it is characterized in that, set the presumptive area on the first type surface of transparent substrate for such zone, promptly, the chamfer surface that this zone does not comprise the distance transparent substrate greater than 0mm, be not more than the peripheral edge margin of 3mm, wherein, the presumptive area on the described first type surface is the zone that obtains surface shape information in the surface shape information obtaining step.
7. the manufacture method of mask blank as claimed in claim 4 is characterized in that, further comprises the membrane stress controlled step, in this step, carrying out film when forming step and/or afterwards, reduces the membrane stress of this film.
8. the manufacture method of mask blank as claimed in claim 7 is characterized in that, the membrane stress controlled step by this film is heated to 150 ℃ or with on carry out.
9. the manufacture method of mask blank as claimed in claim 4 is characterized in that, is such shape in the surface configuration of the first type surface of the transparent substrate that forms film side, that is, the height of first type surface reduces to peripheral edge margin gradually from the central area.
10. a method of making exposed mask comprises: in the mask blank that obtains by the mask blank manufacture method according to claim 4, film is formed figure, so that form film pattern on transparent substrate.
11. a method of making semiconductor devices comprises: the exposed mask that obtains by the exposed mask manufacture method according to claim 10 is set, and the film pattern of exposed mask is transferred to etchant resist on the semiconductor chip.
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| JP2005050936A JP5153998B2 (en) | 2005-02-25 | 2005-02-25 | Method for manufacturing transparent substrate for mask blank, method for manufacturing mask blank, method for manufacturing exposure mask, and method for manufacturing semiconductor device |
| JP200550936 | 2005-02-25 | ||
| JP2005-50936 | 2005-02-25 |
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| CN1862376A true CN1862376A (en) | 2006-11-15 |
| CN1862376B CN1862376B (en) | 2011-05-04 |
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| CN2006100514335A Active CN1862376B (en) | 2005-02-25 | 2006-02-24 | Mask blank transparent substrate manufacturing method, mask blank manufacturing method, and exposure mask manufacturing method |
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| Country | Link |
|---|---|
| US (2) | US7901840B2 (en) |
| JP (1) | JP5153998B2 (en) |
| KR (1) | KR101170851B1 (en) |
| CN (1) | CN1862376B (en) |
| DE (1) | DE102006008734A1 (en) |
| TW (1) | TWI454835B (en) |
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- 2005-02-25 JP JP2005050936A patent/JP5153998B2/en not_active Expired - Fee Related
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- 2006-02-24 CN CN2006100514335A patent/CN1862376B/en active Active
- 2006-02-24 TW TW095106197A patent/TWI454835B/en not_active IP Right Cessation
- 2006-02-24 DE DE102006008734A patent/DE102006008734A1/en not_active Withdrawn
- 2006-02-27 US US11/362,353 patent/US7901840B2/en active Active
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2010
- 2010-10-14 US US12/904,970 patent/US8026025B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5153998B2 (en) | 2013-02-27 |
| TWI454835B (en) | 2014-10-01 |
| KR20060094888A (en) | 2006-08-30 |
| TW200702905A (en) | 2007-01-16 |
| JP2006235321A (en) | 2006-09-07 |
| US20110027701A1 (en) | 2011-02-03 |
| KR101170851B1 (en) | 2012-08-02 |
| US20060194126A1 (en) | 2006-08-31 |
| US7901840B2 (en) | 2011-03-08 |
| CN1862376B (en) | 2011-05-04 |
| US8026025B2 (en) | 2011-09-27 |
| DE102006008734A1 (en) | 2006-09-28 |
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